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Finding the Fourth Proportional to 1,215,115.70, 1,822,673.55 and 742,723.70

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Solution

The fourth proportional to 1,215,115.70, 1,822,673.55 and 742,723.70 is: 1,114,085.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,115.70 : 1,822,673.55 = 742,723.70 : x
  2. Step 2: Convert to fraction form
    1,215,115.70/1,822,673.55 = 742,723.70/x
  3. Step 3: Cross multiply
    1,215,115.70x = 1,822,673.55 × 742,723.70
  4. Step 4: Simplify right side
    1,215,115.70x = 1,353,742,842,948.14
  5. Step 5: Solve for x
    x = 1,353,742,842,948.14/1,215,115.70
  6. Step 6: Final answer
    x = 1,114,085.55

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.